Up to 45 eligible patients will be enrolled to participate in two crossover sessions of 60 hours of consecutive days, with closed-loop or sensor-augmented pump therapy (Minimed ®Paradigm). The sequence of the sessions will be randomly assigned. The randomization will be blocked randomization (1:1). Patients will be assigned to one of the following arm: Group A: 60 hours under closed-loop control and then 60 hours of sensor augmented pump therapy and Group B: 60 hours using sensor augmented pump therapy and then 60 hours under closed-loop control.